Central Nervous System
Fig 1. Pupil light reflex pathway. Red and blue lines represent the...
Pupil light reflex pathway.Red and blue lines represent the afferent pathway, the ganglion cell axons project to the pretectal region of the midbrain; green line represents the efferent pathway, the signal transmits from preganglionic parasympathetic fiber to ciliary ganglion, finally to the constrictor muscles through the short posterior ciliary nerve.
The Radiologist on Instagram: “Read on for more about the anatomy of the middle cerebral artery MIDDLE CEREBRAL ARTERY (MCA) ANATOMY 👨🏽💻Why is it important to know…”
Read on for more about the anatomy of the middle cerebral artery MIDDLE CEREBRAL ARTERY (MCA) ANATOMY 👨🏽💻Why is it important to know…
Brainstem II: Pons and Cerebellum Part 2
Caudal pons. (A) Cross section through the caudal aspect of the pons at the level of the facial colliculus of the pons. Note that the axons of cranial nerve (CN) VII pass dorsomedially around the dorsal aspect of the nucleus of CN VI, forming the facial colliculus, and then pass ventrolaterally to exit the brainstem. In contrast, the axons of CN VI pass ventrally to exit the brainstem in a relatively medial position. (B) Myelin-stained cross section through the caudal aspect of the pons.
How do you feel — now? The anterior insula and human awareness
A photograph of the left insular cortex of a human patient. For a comparison with the insulae of other patients, see Ref. 114. The human insular cortex is a distinct but hidden lobe of the brain. It is disproportionately (approx30%) enlarged in the human relative to the macaque monkey109. It has 5–7 oblique gyri, but its morphology is quite variable, even between the two sides.